+ glClearColor(0.8f, 0.8f, 1.0f, 0.0f);
+
+ /* Tessellation, "finding intersecting triangles" */
+ /* http://research.microsoft.com/pubs/70307/tr-2006-81.pdf */
+ /* http://www.opengl.org/wiki/Alpha_Blending */
+ glAlphaFunc(GL_GREATER,0.1);
+ glEnable(GL_ALPHA_TEST);